The same problem happened to me today - alerts stopped sending and the UI will no longer open. Now there are just three tabs - Control, Edit, Advanced, and if I click on Edit, I get "Opening vaInit..." perpetually. I'm using a VeraLite on UI5. I checked for the files mentioned in this thread and removed them. No change. Then I uninstalled VeraAlerts completely, then removed all J_VeraAlert* files then reinstalled the app - 7.21. No change. Incidentally, I noticed that rts-services.com appears to be down - taking too long to respond error. Related?

A "never-mind" message to my last message - found a thread that says new version incompatible with UI5 and another old message that had a link to install an old version. Working on it now. Foiled by auto-update.